Well-boring bit



June 17, 1930; .F.YLI. BRONSCN 1,764,432

WELL BORING BIT Filed Feb. 24, 1925 E'edL.Bro7won7 gwpmto o WW I Patented June 17, 1930' UNITEDSTATES FRED 1.. BRONSON, or LOS ANGELES, acnnzrnoitnm" WELL-BORING BIT Application. filed. February 24, 1925. Serial no. 11,173.

The invention relates broadly to well bor 7 ing bits and is more particularly defined as thedisc type of bit.

The chief object of the invention is to provide a disc bit of rigid leg constructlon having economically replaceable wearing parts. I Another object of the invention is to provide means of applying water to the cutting 11 edges of the discs.

11 111131181 objects and advantages of the invention will'be apparent as the invention is more fully described. p

i In view of the foregoing the 1nvent1on resides in the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying "drawing, wherein 1 j I Figure 1 is a side view of the blt assembled complete. Figure 2 is an enlarged transverse V18W of the bit assembly partly sectioned, illus- 'trating the constructionand manner of assembly.

I 2i i Fig. Sis a perspective view of one of i the thrust washers; and

Fig. 4 is a perspective view of a bolt locking member employed in connection with the bit.

ing a longitudinal aperture therethrough as shown.

, thereof by means of threaded pinsas shown i at P) is anupward projection ofthe connecting member (41:). 1s atapered collarrthreaded on theprojection (4) for tight joint. It will be noted the connecting member (4) has an aperture therethrough in association with the longitudinal apern ture of the shank (1) for the purpose here inafter stated. The connecting member (4) is provided with two bearing surfaces disposed oppositely in a relative offset position' adjacent the legs (2) and (3), upon which the cutting discs (7) and (8) are illie invention comprises a sl1anlc(1) have.

t (2) and-(3) are legs projecting,

" downward from the lower end thereof."

is a connecting member disposed between s 35 the legs (2) and (3) and attached to each" the purpose of making a substantially water "mounted, the pins (5) being threaded into the connectingmember the l above mentioned bearing surfaces}; and

( 10) are "thrust washers "mounted on the 3;:

connecting member (4:) between the cutting 2 discs and the legs to prevent wear on the legs as the discs revolve. Referring to Fig.

3, it will be noted that thethrust washers (9.) -and (10) have two flat surfacesinternally thereof whichsengage corresponding agon head of the pin thus permitting 7 locking the pin at different angles.

To disassemble the bit, thescrews (12),

the locking members (11) and the pins ('5) p M are removed and the connecting member L which carries the discs (7) and(8). and the L 5 thrust-.washers (9) and (10) is :loweredj 1 i from between the legs (2) and (3). fth11Si permitting thevarious parts to be removed p from theconnecting member(4). .The'bit v I is assembled in a similar manner which is quite obvious. v the drawing, it will be noted thefldiscs (7) and (8) project beyond 'the opposite sides. oftheshank which. arranges them in an ofl'center position causing approximately two-fifthsof the discs circumference to contact the bottom of the hole which causes. the discs to revolve thus utilizing the en- (tire circumferential cutting edge offeach isc.

shank and the connecting member discharging near the lower,cuttingedgesof I the discs. thus forcing the cuttings away,

from the said discs and floating the mudlto the top of the well where it is disposed of. It is-believed that the foregoing descrip-' tion clear-1y explains the nature, operation and advantages of the invention. I desire to indicate clearly, however, that'I do not 156 5 Referring to Figure 1 ON -f) I v When in operation, water. is forced: a downthrough therentral aperture. of the limit myself to the specific construction herein shown and described and that such modifications may be included as fall Within the scope of What is herein claimed.

What I claim is A rotary disk bit comprising a tubular shank having a pair of legs projecting from the lower end thereof, a connecting member carried by said shank and disposed between said legs, said member being longitudinally adjustable With respectto said shank, said member also having oflset laterally extending integrally formed tubular bearing arms extending to points adjacent said legs, bolts extending through each leg and threaded into said bearing arms, and a cutting disk mounted on each of said bearing surfaces.

Signed at Los Angeles, this 17th day of February 1925. 20 FRED L. BRONSON.

so I 

